Via NL Times:
Three so-called Stolpersteine were stolen from Graaf Florisstraat and Mathenesserlaan in Rotterdam, RTV Rijnmond reports. These memorial stones consist of plaques built into the sidewalk in front of houses where people lived who were deported in the Second World War. It mostly involves Jewish people.
It is unclear exactly when the plaques were stolen. According to the local broadcaster, the police have no indication that other plaques are missing.